1 /* Assorted BFD support routines, only used internally.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
5 Written by Cygnus Support.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
28 #ifndef HAVE_GETPAGESIZE
29 #define getpagesize() 2048
34 Implementation details
40 These routines are used within BFD.
41 They are not intended for export, but are documented here for
45 /* A routine which is used in target vectors for unsupported
49 bfd_false (bfd *ignore ATTRIBUTE_UNUSED)
51 bfd_set_error (bfd_error_invalid_operation);
55 /* A routine which is used in target vectors for supported operations
56 which do not actually do anything. */
59 bfd_true (bfd *ignore ATTRIBUTE_UNUSED)
64 /* A routine which is used in target vectors for unsupported
65 operations which return a pointer value. */
68 bfd_nullvoidptr (bfd *ignore ATTRIBUTE_UNUSED)
70 bfd_set_error (bfd_error_invalid_operation);
75 bfd_0 (bfd *ignore ATTRIBUTE_UNUSED)
81 bfd_0u (bfd *ignore ATTRIBUTE_UNUSED)
87 bfd_0l (bfd *ignore ATTRIBUTE_UNUSED)
92 /* A routine which is used in target vectors for unsupported
93 operations which return -1 on error. */
96 _bfd_n1 (bfd *ignore_abfd ATTRIBUTE_UNUSED)
98 bfd_set_error (bfd_error_invalid_operation);
103 bfd_void (bfd *ignore ATTRIBUTE_UNUSED)
108 _bfd_norelocs_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
109 asection *sec ATTRIBUTE_UNUSED)
111 return sizeof (arelent *);
115 _bfd_norelocs_canonicalize_reloc (bfd *abfd ATTRIBUTE_UNUSED,
116 asection *sec ATTRIBUTE_UNUSED,
118 asymbol **symbols ATTRIBUTE_UNUSED)
125 _bfd_nocore_core_file_matches_executable_p
126 (bfd *ignore_core_bfd ATTRIBUTE_UNUSED,
127 bfd *ignore_exec_bfd ATTRIBUTE_UNUSED)
129 bfd_set_error (bfd_error_invalid_operation);
133 /* Routine to handle core_file_failing_command entry point for targets
134 without core file support. */
137 _bfd_nocore_core_file_failing_command (bfd *ignore_abfd ATTRIBUTE_UNUSED)
139 bfd_set_error (bfd_error_invalid_operation);
143 /* Routine to handle core_file_failing_signal entry point for targets
144 without core file support. */
147 _bfd_nocore_core_file_failing_signal (bfd *ignore_abfd ATTRIBUTE_UNUSED)
149 bfd_set_error (bfd_error_invalid_operation);
153 /* Routine to handle the core_file_pid entry point for targets without
154 core file support. */
157 _bfd_nocore_core_file_pid (bfd *ignore_abfd ATTRIBUTE_UNUSED)
159 bfd_set_error (bfd_error_invalid_operation);
164 _bfd_dummy_target (bfd *ignore_abfd ATTRIBUTE_UNUSED)
166 bfd_set_error (bfd_error_wrong_format);
170 /* Allocate memory using malloc. */
173 bfd_malloc (bfd_size_type size)
177 if (size != (size_t) size)
179 bfd_set_error (bfd_error_no_memory);
183 ptr = malloc ((size_t) size);
184 if (ptr == NULL && (size_t) size != 0)
185 bfd_set_error (bfd_error_no_memory);
190 /* Allocate memory using malloc, nmemb * size with overflow checking. */
193 bfd_malloc2 (bfd_size_type nmemb, bfd_size_type size)
197 if ((nmemb | size) >= HALF_BFD_SIZE_TYPE
199 && nmemb > ~(bfd_size_type) 0 / size)
201 bfd_set_error (bfd_error_no_memory);
207 if (size != (size_t) size)
209 bfd_set_error (bfd_error_no_memory);
213 ptr = malloc ((size_t) size);
214 if (ptr == NULL && (size_t) size != 0)
215 bfd_set_error (bfd_error_no_memory);
220 /* Reallocate memory using realloc. */
223 bfd_realloc (void *ptr, bfd_size_type size)
227 if (size != (size_t) size)
229 bfd_set_error (bfd_error_no_memory);
234 ret = malloc ((size_t) size);
236 ret = realloc (ptr, (size_t) size);
238 if (ret == NULL && (size_t) size != 0)
239 bfd_set_error (bfd_error_no_memory);
244 /* Reallocate memory using realloc, nmemb * size with overflow checking. */
247 bfd_realloc2 (void *ptr, bfd_size_type nmemb, bfd_size_type size)
251 if ((nmemb | size) >= HALF_BFD_SIZE_TYPE
253 && nmemb > ~(bfd_size_type) 0 / size)
255 bfd_set_error (bfd_error_no_memory);
261 if (size != (size_t) size)
263 bfd_set_error (bfd_error_no_memory);
268 ret = malloc ((size_t) size);
270 ret = realloc (ptr, (size_t) size);
272 if (ret == NULL && (size_t) size != 0)
273 bfd_set_error (bfd_error_no_memory);
278 /* Reallocate memory using realloc.
279 If this fails the pointer is freed before returning. */
282 bfd_realloc_or_free (void *ptr, bfd_size_type size)
284 size_t amount = (size_t) size;
289 else if (ptr == NULL)
290 ret = malloc (amount);
292 ret = realloc (ptr, amount);
297 bfd_set_error (bfd_error_no_memory);
306 /* Allocate memory using malloc and clear it. */
309 bfd_zmalloc (bfd_size_type size)
313 if (size != (size_t) size)
315 bfd_set_error (bfd_error_no_memory);
319 ptr = malloc ((size_t) size);
321 if ((size_t) size != 0)
324 bfd_set_error (bfd_error_no_memory);
326 memset (ptr, 0, (size_t) size);
332 /* Allocate memory using malloc (nmemb * size) with overflow checking
336 bfd_zmalloc2 (bfd_size_type nmemb, bfd_size_type size)
340 if ((nmemb | size) >= HALF_BFD_SIZE_TYPE
342 && nmemb > ~(bfd_size_type) 0 / size)
344 bfd_set_error (bfd_error_no_memory);
350 if (size != (size_t) size)
352 bfd_set_error (bfd_error_no_memory);
356 ptr = malloc ((size_t) size);
358 if ((size_t) size != 0)
361 bfd_set_error (bfd_error_no_memory);
363 memset (ptr, 0, (size_t) size);
371 bfd_write_bigendian_4byte_int
374 bfd_boolean bfd_write_bigendian_4byte_int (bfd *, unsigned int);
377 Write a 4 byte integer @var{i} to the output BFD @var{abfd}, in big
378 endian order regardless of what else is going on. This is useful in
383 bfd_write_bigendian_4byte_int (bfd *abfd, unsigned int i)
386 bfd_putb32 ((bfd_vma) i, buffer);
387 return bfd_bwrite (buffer, (bfd_size_type) 4, abfd) == 4;
391 /** The do-it-yourself (byte) sex-change kit */
393 /* The middle letter e.g. get<b>short indicates Big or Little endian
394 target machine. It doesn't matter what the byte order of the host
395 machine is; these routines work for either. */
397 /* FIXME: Should these take a count argument?
398 Answer (gnu@cygnus.com): No, but perhaps they should be inline
399 functions in swap.h #ifdef __GNUC__.
400 Gprof them later and find out. */
409 These macros as used for reading and writing raw data in
410 sections; each access (except for bytes) is vectored through
411 the target format of the BFD and mangled accordingly. The
412 mangling performs any necessary endian translations and
413 removes alignment restrictions. Note that types accepted and
414 returned by these macros are identical so they can be swapped
415 around in macros---for example, @file{libaout.h} defines <<GET_WORD>>
416 to either <<bfd_get_32>> or <<bfd_get_64>>.
418 In the put routines, @var{val} must be a <<bfd_vma>>. If we are on a
419 system without prototypes, the caller is responsible for making
420 sure that is true, with a cast if necessary. We don't cast
421 them in the macro definitions because that would prevent <<lint>>
422 or <<gcc -Wall>> from detecting sins such as passing a pointer.
423 To detect calling these with less than a <<bfd_vma>>, use
424 <<gcc -Wconversion>> on a host with 64 bit <<bfd_vma>>'s.
427 .{* Byte swapping macros for user section data. *}
429 .#define bfd_put_8(abfd, val, ptr) \
430 . ((void) (*((unsigned char *) (ptr)) = (val) & 0xff))
431 .#define bfd_put_signed_8 \
433 .#define bfd_get_8(abfd, ptr) \
434 . (*(const unsigned char *) (ptr) & 0xff)
435 .#define bfd_get_signed_8(abfd, ptr) \
436 . (((*(const unsigned char *) (ptr) & 0xff) ^ 0x80) - 0x80)
438 .#define bfd_put_16(abfd, val, ptr) \
439 . BFD_SEND (abfd, bfd_putx16, ((val),(ptr)))
440 .#define bfd_put_signed_16 \
442 .#define bfd_get_16(abfd, ptr) \
443 . BFD_SEND (abfd, bfd_getx16, (ptr))
444 .#define bfd_get_signed_16(abfd, ptr) \
445 . BFD_SEND (abfd, bfd_getx_signed_16, (ptr))
447 .#define bfd_put_32(abfd, val, ptr) \
448 . BFD_SEND (abfd, bfd_putx32, ((val),(ptr)))
449 .#define bfd_put_signed_32 \
451 .#define bfd_get_32(abfd, ptr) \
452 . BFD_SEND (abfd, bfd_getx32, (ptr))
453 .#define bfd_get_signed_32(abfd, ptr) \
454 . BFD_SEND (abfd, bfd_getx_signed_32, (ptr))
456 .#define bfd_put_64(abfd, val, ptr) \
457 . BFD_SEND (abfd, bfd_putx64, ((val), (ptr)))
458 .#define bfd_put_signed_64 \
460 .#define bfd_get_64(abfd, ptr) \
461 . BFD_SEND (abfd, bfd_getx64, (ptr))
462 .#define bfd_get_signed_64(abfd, ptr) \
463 . BFD_SEND (abfd, bfd_getx_signed_64, (ptr))
465 .#define bfd_get(bits, abfd, ptr) \
466 . ((bits) == 8 ? (bfd_vma) bfd_get_8 (abfd, ptr) \
467 . : (bits) == 16 ? bfd_get_16 (abfd, ptr) \
468 . : (bits) == 32 ? bfd_get_32 (abfd, ptr) \
469 . : (bits) == 64 ? bfd_get_64 (abfd, ptr) \
470 . : (abort (), (bfd_vma) - 1))
472 .#define bfd_put(bits, abfd, val, ptr) \
473 . ((bits) == 8 ? bfd_put_8 (abfd, val, ptr) \
474 . : (bits) == 16 ? bfd_put_16 (abfd, val, ptr) \
475 . : (bits) == 32 ? bfd_put_32 (abfd, val, ptr) \
476 . : (bits) == 64 ? bfd_put_64 (abfd, val, ptr) \
477 . : (abort (), (void) 0))
487 These macros have the same function as their <<bfd_get_x>>
488 brethren, except that they are used for removing information
489 for the header records of object files. Believe it or not,
490 some object files keep their header records in big endian
491 order and their data in little endian order.
493 .{* Byte swapping macros for file header data. *}
495 .#define bfd_h_put_8(abfd, val, ptr) \
496 . bfd_put_8 (abfd, val, ptr)
497 .#define bfd_h_put_signed_8(abfd, val, ptr) \
498 . bfd_put_8 (abfd, val, ptr)
499 .#define bfd_h_get_8(abfd, ptr) \
500 . bfd_get_8 (abfd, ptr)
501 .#define bfd_h_get_signed_8(abfd, ptr) \
502 . bfd_get_signed_8 (abfd, ptr)
504 .#define bfd_h_put_16(abfd, val, ptr) \
505 . BFD_SEND (abfd, bfd_h_putx16, (val, ptr))
506 .#define bfd_h_put_signed_16 \
508 .#define bfd_h_get_16(abfd, ptr) \
509 . BFD_SEND (abfd, bfd_h_getx16, (ptr))
510 .#define bfd_h_get_signed_16(abfd, ptr) \
511 . BFD_SEND (abfd, bfd_h_getx_signed_16, (ptr))
513 .#define bfd_h_put_32(abfd, val, ptr) \
514 . BFD_SEND (abfd, bfd_h_putx32, (val, ptr))
515 .#define bfd_h_put_signed_32 \
517 .#define bfd_h_get_32(abfd, ptr) \
518 . BFD_SEND (abfd, bfd_h_getx32, (ptr))
519 .#define bfd_h_get_signed_32(abfd, ptr) \
520 . BFD_SEND (abfd, bfd_h_getx_signed_32, (ptr))
522 .#define bfd_h_put_64(abfd, val, ptr) \
523 . BFD_SEND (abfd, bfd_h_putx64, (val, ptr))
524 .#define bfd_h_put_signed_64 \
526 .#define bfd_h_get_64(abfd, ptr) \
527 . BFD_SEND (abfd, bfd_h_getx64, (ptr))
528 .#define bfd_h_get_signed_64(abfd, ptr) \
529 . BFD_SEND (abfd, bfd_h_getx_signed_64, (ptr))
531 .{* Aliases for the above, which should eventually go away. *}
533 .#define H_PUT_64 bfd_h_put_64
534 .#define H_PUT_32 bfd_h_put_32
535 .#define H_PUT_16 bfd_h_put_16
536 .#define H_PUT_8 bfd_h_put_8
537 .#define H_PUT_S64 bfd_h_put_signed_64
538 .#define H_PUT_S32 bfd_h_put_signed_32
539 .#define H_PUT_S16 bfd_h_put_signed_16
540 .#define H_PUT_S8 bfd_h_put_signed_8
541 .#define H_GET_64 bfd_h_get_64
542 .#define H_GET_32 bfd_h_get_32
543 .#define H_GET_16 bfd_h_get_16
544 .#define H_GET_8 bfd_h_get_8
545 .#define H_GET_S64 bfd_h_get_signed_64
546 .#define H_GET_S32 bfd_h_get_signed_32
547 .#define H_GET_S16 bfd_h_get_signed_16
548 .#define H_GET_S8 bfd_h_get_signed_8
552 /* Sign extension to bfd_signed_vma. */
553 #define COERCE16(x) (((bfd_signed_vma) (x) ^ 0x8000) - 0x8000)
554 #define COERCE32(x) (((bfd_signed_vma) (x) ^ 0x80000000) - 0x80000000)
555 #define EIGHT_GAZILLION ((bfd_int64_t) 1 << 63)
556 #define COERCE64(x) \
557 (((bfd_int64_t) (x) ^ EIGHT_GAZILLION) - EIGHT_GAZILLION)
560 bfd_getb16 (const void *p)
562 const bfd_byte *addr = (const bfd_byte *) p;
563 return (addr[0] << 8) | addr[1];
567 bfd_getl16 (const void *p)
569 const bfd_byte *addr = (const bfd_byte *) p;
570 return (addr[1] << 8) | addr[0];
574 bfd_getb_signed_16 (const void *p)
576 const bfd_byte *addr = (const bfd_byte *) p;
577 return COERCE16 ((addr[0] << 8) | addr[1]);
581 bfd_getl_signed_16 (const void *p)
583 const bfd_byte *addr = (const bfd_byte *) p;
584 return COERCE16 ((addr[1] << 8) | addr[0]);
588 bfd_putb16 (bfd_vma data, void *p)
590 bfd_byte *addr = (bfd_byte *) p;
591 addr[0] = (data >> 8) & 0xff;
592 addr[1] = data & 0xff;
596 bfd_putl16 (bfd_vma data, void *p)
598 bfd_byte *addr = (bfd_byte *) p;
599 addr[0] = data & 0xff;
600 addr[1] = (data >> 8) & 0xff;
604 bfd_getb32 (const void *p)
606 const bfd_byte *addr = (const bfd_byte *) p;
609 v = (unsigned long) addr[0] << 24;
610 v |= (unsigned long) addr[1] << 16;
611 v |= (unsigned long) addr[2] << 8;
612 v |= (unsigned long) addr[3];
617 bfd_getl32 (const void *p)
619 const bfd_byte *addr = (const bfd_byte *) p;
622 v = (unsigned long) addr[0];
623 v |= (unsigned long) addr[1] << 8;
624 v |= (unsigned long) addr[2] << 16;
625 v |= (unsigned long) addr[3] << 24;
630 bfd_getb_signed_32 (const void *p)
632 const bfd_byte *addr = (const bfd_byte *) p;
635 v = (unsigned long) addr[0] << 24;
636 v |= (unsigned long) addr[1] << 16;
637 v |= (unsigned long) addr[2] << 8;
638 v |= (unsigned long) addr[3];
643 bfd_getl_signed_32 (const void *p)
645 const bfd_byte *addr = (const bfd_byte *) p;
648 v = (unsigned long) addr[0];
649 v |= (unsigned long) addr[1] << 8;
650 v |= (unsigned long) addr[2] << 16;
651 v |= (unsigned long) addr[3] << 24;
656 bfd_getb64 (const void *p ATTRIBUTE_UNUSED)
658 #ifdef BFD_HOST_64_BIT
659 const bfd_byte *addr = (const bfd_byte *) p;
662 v = addr[0]; v <<= 8;
663 v |= addr[1]; v <<= 8;
664 v |= addr[2]; v <<= 8;
665 v |= addr[3]; v <<= 8;
666 v |= addr[4]; v <<= 8;
667 v |= addr[5]; v <<= 8;
668 v |= addr[6]; v <<= 8;
679 bfd_getl64 (const void *p ATTRIBUTE_UNUSED)
681 #ifdef BFD_HOST_64_BIT
682 const bfd_byte *addr = (const bfd_byte *) p;
685 v = addr[7]; v <<= 8;
686 v |= addr[6]; v <<= 8;
687 v |= addr[5]; v <<= 8;
688 v |= addr[4]; v <<= 8;
689 v |= addr[3]; v <<= 8;
690 v |= addr[2]; v <<= 8;
691 v |= addr[1]; v <<= 8;
703 bfd_getb_signed_64 (const void *p ATTRIBUTE_UNUSED)
705 #ifdef BFD_HOST_64_BIT
706 const bfd_byte *addr = (const bfd_byte *) p;
709 v = addr[0]; v <<= 8;
710 v |= addr[1]; v <<= 8;
711 v |= addr[2]; v <<= 8;
712 v |= addr[3]; v <<= 8;
713 v |= addr[4]; v <<= 8;
714 v |= addr[5]; v <<= 8;
715 v |= addr[6]; v <<= 8;
726 bfd_getl_signed_64 (const void *p ATTRIBUTE_UNUSED)
728 #ifdef BFD_HOST_64_BIT
729 const bfd_byte *addr = (const bfd_byte *) p;
732 v = addr[7]; v <<= 8;
733 v |= addr[6]; v <<= 8;
734 v |= addr[5]; v <<= 8;
735 v |= addr[4]; v <<= 8;
736 v |= addr[3]; v <<= 8;
737 v |= addr[2]; v <<= 8;
738 v |= addr[1]; v <<= 8;
749 bfd_putb32 (bfd_vma data, void *p)
751 bfd_byte *addr = (bfd_byte *) p;
752 addr[0] = (data >> 24) & 0xff;
753 addr[1] = (data >> 16) & 0xff;
754 addr[2] = (data >> 8) & 0xff;
755 addr[3] = data & 0xff;
759 bfd_putl32 (bfd_vma data, void *p)
761 bfd_byte *addr = (bfd_byte *) p;
762 addr[0] = data & 0xff;
763 addr[1] = (data >> 8) & 0xff;
764 addr[2] = (data >> 16) & 0xff;
765 addr[3] = (data >> 24) & 0xff;
769 bfd_putb64 (bfd_uint64_t data ATTRIBUTE_UNUSED, void *p ATTRIBUTE_UNUSED)
771 #ifdef BFD_HOST_64_BIT
772 bfd_byte *addr = (bfd_byte *) p;
773 addr[0] = (data >> (7*8)) & 0xff;
774 addr[1] = (data >> (6*8)) & 0xff;
775 addr[2] = (data >> (5*8)) & 0xff;
776 addr[3] = (data >> (4*8)) & 0xff;
777 addr[4] = (data >> (3*8)) & 0xff;
778 addr[5] = (data >> (2*8)) & 0xff;
779 addr[6] = (data >> (1*8)) & 0xff;
780 addr[7] = (data >> (0*8)) & 0xff;
787 bfd_putl64 (bfd_uint64_t data ATTRIBUTE_UNUSED, void *p ATTRIBUTE_UNUSED)
789 #ifdef BFD_HOST_64_BIT
790 bfd_byte *addr = (bfd_byte *) p;
791 addr[7] = (data >> (7*8)) & 0xff;
792 addr[6] = (data >> (6*8)) & 0xff;
793 addr[5] = (data >> (5*8)) & 0xff;
794 addr[4] = (data >> (4*8)) & 0xff;
795 addr[3] = (data >> (3*8)) & 0xff;
796 addr[2] = (data >> (2*8)) & 0xff;
797 addr[1] = (data >> (1*8)) & 0xff;
798 addr[0] = (data >> (0*8)) & 0xff;
805 bfd_put_bits (bfd_uint64_t data, void *p, int bits, bfd_boolean big_p)
807 bfd_byte *addr = (bfd_byte *) p;
815 for (i = 0; i < bytes; i++)
817 int addr_index = big_p ? bytes - i - 1 : i;
819 addr[addr_index] = data & 0xff;
825 bfd_get_bits (const void *p, int bits, bfd_boolean big_p)
827 const bfd_byte *addr = (const bfd_byte *) p;
837 for (i = 0; i < bytes; i++)
839 int addr_index = big_p ? i : bytes - i - 1;
841 data = (data << 8) | addr[addr_index];
847 /* Default implementation */
850 _bfd_generic_get_section_contents (bfd *abfd,
860 if (section->compress_status != COMPRESS_SECTION_NONE)
862 (*_bfd_error_handler)
863 (_("%B: unable to get decompressed section %A"),
865 bfd_set_error (bfd_error_invalid_operation);
869 /* We do allow reading of a section after bfd_final_link has
870 written the contents out to disk. In that situation, rawsize is
871 just a stale version of size, so ignore it. Otherwise we must be
872 reading an input section, where rawsize, if different to size,
873 is the on-disk size. */
874 if (abfd->direction != write_direction && section->rawsize != 0)
875 sz = section->rawsize;
878 if (offset + count < count
879 || offset + count > sz)
881 bfd_set_error (bfd_error_invalid_operation);
885 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
886 || bfd_bread (location, count, abfd) != count)
893 _bfd_generic_get_section_contents_in_window
894 (bfd *abfd ATTRIBUTE_UNUSED,
895 sec_ptr section ATTRIBUTE_UNUSED,
896 bfd_window *w ATTRIBUTE_UNUSED,
897 file_ptr offset ATTRIBUTE_UNUSED,
898 bfd_size_type count ATTRIBUTE_UNUSED)
905 if (abfd->xvec->_bfd_get_section_contents
906 != _bfd_generic_get_section_contents)
908 /* We don't know what changes the bfd's get_section_contents
909 method may have to make. So punt trying to map the file
910 window, and let get_section_contents do its thing. */
911 /* @@ FIXME : If the internal window has a refcount of 1 and was
912 allocated with malloc instead of mmap, just reuse it. */
914 w->i = bfd_zmalloc (sizeof (bfd_window_internal));
917 w->i->data = bfd_malloc (count);
918 if (w->i->data == NULL)
926 w->size = w->i->size = count;
927 w->data = w->i->data;
928 return bfd_get_section_contents (abfd, section, w->data, offset, count);
930 if (abfd->direction != write_direction && section->rawsize != 0)
931 sz = section->rawsize;
934 if (offset + count > sz
935 || ! bfd_get_file_window (abfd, section->filepos + offset, count, w,
944 /* This generic function can only be used in implementations where creating
945 NEW sections is disallowed. It is useful in patching existing sections
946 in read-write files, though. See other set_section_contents functions
947 to see why it doesn't work for new sections. */
949 _bfd_generic_set_section_contents (bfd *abfd,
951 const void *location,
958 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
959 || bfd_bwrite (location, count, abfd) != count)
970 unsigned int bfd_log2 (bfd_vma x);
973 Return the log base 2 of the value supplied, rounded up. E.g., an
974 @var{x} of 1025 returns 11. A @var{x} of 0 returns 0.
980 unsigned int result = 0;
987 while ((x >>= 1) != 0);
992 bfd_generic_is_local_label_name (bfd *abfd, const char *name)
994 char locals_prefix = (bfd_get_symbol_leading_char (abfd) == '_') ? 'L' : '.';
996 return name[0] == locals_prefix;
999 /* Can be used from / for bfd_merge_private_bfd_data to check that
1000 endianness matches between input and output file. Returns
1001 TRUE for a match, otherwise returns FALSE and emits an error. */
1003 _bfd_generic_verify_endian_match (bfd *ibfd, bfd *obfd)
1005 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
1006 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
1007 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
1011 if (bfd_big_endian (ibfd))
1012 msg = _("%B: compiled for a big endian system and target is little endian");
1014 msg = _("%B: compiled for a little endian system and target is big endian");
1016 (*_bfd_error_handler) (msg, ibfd);
1018 bfd_set_error (bfd_error_wrong_format);
1025 /* Give a warning at runtime if someone compiles code which calls
1029 warn_deprecated (const char *what,
1034 /* Poor man's tracking of functions we've already warned about. */
1035 static size_t mask = 0;
1037 if (~(size_t) func & ~mask)
1040 /* Note: separate sentences in order to allow
1041 for translation into other languages. */
1043 fprintf (stderr, _("Deprecated %s called at %s line %d in %s\n"),
1044 what, file, line, func);
1046 fprintf (stderr, _("Deprecated %s called\n"), what);
1048 mask |= ~(size_t) func;
1052 /* Helper function for reading uleb128 encoded data. */
1055 read_unsigned_leb128 (bfd *abfd ATTRIBUTE_UNUSED,
1057 unsigned int *bytes_read_ptr)
1060 unsigned int num_read;
1069 byte = bfd_get_8 (abfd, buf);
1072 result |= (((bfd_vma) byte & 0x7f) << shift);
1075 while (byte & 0x80);
1076 *bytes_read_ptr = num_read;
1080 /* Helper function for reading sleb128 encoded data. */
1083 read_signed_leb128 (bfd *abfd ATTRIBUTE_UNUSED,
1085 unsigned int *bytes_read_ptr)
1089 unsigned int num_read;
1097 byte = bfd_get_8 (abfd, buf);
1100 result |= (((bfd_vma) byte & 0x7f) << shift);
1103 while (byte & 0x80);
1104 if (shift < 8 * sizeof (result) && (byte & 0x40))
1105 result |= (((bfd_vma) -1) << shift);
1106 *bytes_read_ptr = num_read;
1111 _bfd_generic_find_line (bfd *abfd ATTRIBUTE_UNUSED,
1112 asymbol **symbols ATTRIBUTE_UNUSED,
1113 asymbol *symbol ATTRIBUTE_UNUSED,
1114 const char **filename_ptr ATTRIBUTE_UNUSED,
1115 unsigned int *linenumber_ptr ATTRIBUTE_UNUSED)
1121 _bfd_generic_find_nearest_line_discriminator (bfd *abfd ATTRIBUTE_UNUSED,
1122 asection *section ATTRIBUTE_UNUSED,
1123 asymbol **symbols ATTRIBUTE_UNUSED,
1124 bfd_vma offset ATTRIBUTE_UNUSED,
1125 const char **filename_ptr ATTRIBUTE_UNUSED,
1126 const char **functionname_ptr ATTRIBUTE_UNUSED,
1127 unsigned int *line_ptr ATTRIBUTE_UNUSED,
1128 unsigned int *discriminator_ptr ATTRIBUTE_UNUSED)
1134 _bfd_generic_init_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED,
1135 asection *isec ATTRIBUTE_UNUSED,
1136 bfd *obfd ATTRIBUTE_UNUSED,
1137 asection *osec ATTRIBUTE_UNUSED,
1138 struct bfd_link_info *link_info ATTRIBUTE_UNUSED)